Tuesday, December 05, 2017

How important is an intake pushrod tip? If it breaks, it can cost you the entire engine

an intake pushrod tip broke off just before the 800-foot mark, leading to a costly engine explosion.

“That was about a $30,000 pushrod,” said Miller. “When the engine is running along at that speed and you break a pushrod, suddenly you have a seven-cylinder engine.

The blower is still putting out enough air for eight so the other remaining players get 10 pounds more boost. Because each of the cylinders have a fixed fuel volume and suddenly are getting 15 percent more air, they go dead lean and start to detonate and it blows the rods out of it.”